The Camco 44500 RV FasTen Leveling Block Caps fit onto the top of Camco's leveling blocks to form a smooth surface without increasing the stack height. The caps help create a more stable, secure surface for jacks and stabilizers to operate on by distributing the weight of the vehicle more evenly. Also used to connect two adjacent blocks together, if you only need one block worth of height or stack on a single leveling block to create a stabilizing jack pad. These blocks increase the versatility of the leveling blocks and create an ideal surface for scissor jacks, trailer tongues, stabilizers, wheels and more.